Baselines API

Functions
DLL_EXPORT void	vlbi_set_correlation_order (void *ctx, int order)
	Set the correlation order the current OpenVLBI context. More...
DLL_EXPORT int	vlbi_get_baselines (void *ctx, vlbi_baseline **baselines)
	List all baselines of the current OpenVLBI context. More...
DLL_EXPORT void	vlbi_free_baselines (vlbi_baseline **baselines, int num_baselines)
	Free a vlbi_baseline object previously allocated by vlbi_get_baselines. More...
DLL_EXPORT void	vlbi_set_baseline_buffer (void *ctx, const char **nodes, complex_t *buffer, int len)
	Fill the buffer of a single baseline with complex visibility data. This function locks this baeline and the data passed here will overwrite the correlated visibilities from its nodes. More...
DLL_EXPORT dsp_stream_p	vlbi_get_baseline_stream (void *ctx, const char **nodes)
	Obtain the baseline dsp_stream structure containing the complex visibility data. More...
DLL_EXPORT void	vlbi_unlock_baseline (void *ctx, const char **nodes)
	Unlock the baseline and get visibility from its nodes correlations. More...
DLL_EXPORT void	vlbi_set_baseline_stream (void *ctx, const char **nodes, dsp_stream_p stream)
	Set the baseline dsp_stream structure containing the complex visibility data. This function locks this baeline and the data passed here will overwrite the correlated visibilities from its nodes. More...
DLL_EXPORT void	vlbi_set_location (void *ctx, double lat, double lon, double el)
	Set the location of the reference station. More...
DLL_EXPORT double	vlbi_get_offset (vlbi_context ctx, double J2000Time, const char *node, double Ra, double Dec, double Distance)
	Get the offset of a single node to the farest node to the target. More...

Detailed Description

Function Documentation

vlbi_free_baselines()

DLL_EXPORT void vlbi_free_baselines	(	vlbi_baseline **	baselines,
		int	num_baselines
	)

Parameters

baselines	The baselines array pointer
num_baselines	The number of elements into the baselines object

vlbi_get_baseline_stream()

DLL_EXPORT dsp_stream_p vlbi_get_baseline_stream	(	void *	ctx,
		const char **	nodes
	)

Parameters

ctx	The OpenVLBI context
nodes	The names of the node - the array size must be the same as the correlation order

Returns

The dsp_stream structure pointer containing the visibility data

vlbi_get_baselines()

DLL_EXPORT int vlbi_get_baselines	(	void *	ctx,
		vlbi_baseline **	baselines
	)

Parameters

ctx	The OpenVLBI context
baselines	The baselines array pointer to be filled

Returns

the number of baselines in the current context

vlbi_get_offset()

DLL_EXPORT double vlbi_get_offset	(	vlbi_context	ctx,
		double	J2000Time,
		const char *	node,
		double	Ra,
		double	Dec,
		double	Distance
	)

Parameters

ctx	The OpenVLBI context
J2000Time	The time of the calculation
node	The name of the node
Ra	The right ascension coordinate
Dec	The declination coordinate
Distance	The distance from the object

Returns

The offset calculated for the node to the farest one from the object

vlbi_set_baseline_buffer()

DLL_EXPORT void vlbi_set_baseline_buffer	(	void *	ctx,
		const char **	nodes,
		complex_t *	buffer,
		int	len
	)

Parameters

ctx	The OpenVLBI context
nodes	The names of the node - the array size must be the same as the correlation order
buffer	The buffer with complex complex visibility data
len	The length of the buffer

vlbi_set_baseline_stream()

DLL_EXPORT void vlbi_set_baseline_stream	(	void *	ctx,
		const char **	nodes,
		dsp_stream_p	stream
	)

Parameters

ctx	The OpenVLBI context
nodes	The names of the node - the array size must be the same as the correlation order
stream	The dsp_stream structure pointer containing the visibility data

vlbi_set_correlation_order()

DLL_EXPORT void vlbi_set_correlation_order	(	void *	ctx,
		int	order
	)

Parameters

ctx	The OpenVLBI context
order	The correlation order - number of nodes to be correlated into each single baseline

vlbi_set_location()

DLL_EXPORT void vlbi_set_location	(	void *	ctx,
		double	lat,
		double	lon,
		double	el
	)

Parameters

ctx	The OpenVLBI context
lat	The latitude of the station
lon	The longitude of the station
el	The elevation of the station

vlbi_unlock_baseline()

DLL_EXPORT void vlbi_unlock_baseline	(	void *	ctx,
		const char **	nodes
	)

Parameters

ctx	The OpenVLBI context
nodes	The names of the node - the array size must be the same as the correlation order